초록 ▼

A lawn mower has a hydraulic motor mounted on each drive wheel and each motor is independently driven by a separate pump. Each pump includes a control lever for regulating fluid pressure and flow direction so that each wheel may be driven independently in the forward and reverse directions and at va

A lawn mower has a hydraulic motor mounted on each drive wheel and each motor is independently driven by a separate pump. Each pump includes a control lever for regulating fluid pressure and flow direction so that each wheel may be driven independently in the forward and reverse directions and at varying speeds. The control levers are independently connected to two speed control levers mounted on the mower\s hand grips. A speed control index is mounted on each hand grip for releasably maintaining the speed control levers in a plurality of forward speed positions so that it is not necessary for the operator to exert hand pressure on the control levers in order to maintain a desired forward speed. A neutral control assembly returns the pump control levers to a neutral position when the control levers are moved into neutral.

대표청구항 ▼

A lawn mower having a pair of drive wheels, a reversible hydraulic motor coupled to each drive wheel for rotating the same, a pair of simultaneously driven/ pumps with one of said pumps being connected to each motor, and control means coupled to each pump for controlling the pressure and fluid flow

A lawn mower having a pair of drive wheels, a reversible hydraulic motor coupled to each drive wheel for rotating the same, a pair of simultaneously driven/ pumps with one of said pumps being connected to each motor, and control means coupled to each pump for controlling the pressure and fluid flow direction between said pump and its associated motor whereby each drive wheel can be driven at various speeds in the forward and reverse directions, each control means including a control lever coupled to each pump and operable upon being pivoted in a first direction to increase fluid pressure from said pump in a forward direction and being operative upon pivotal movement in the opposite direction to decrease fluid flow to a neutral point where fluid flow ceases and thereafter increasing fluid flow in the reverse direction upon further pivotal movement of said control lever in said opposite direction, biasing means urging said lever in said first direction, index means mounted adjacent each of said control levers and each having a plurality of indexing means, said indexing means each being mounted adjacent one of said control levers and mounted for displacement to move successive ones of said indexing means into an operative position, coupling means on said levers for selectively engaging one of said indexing means, each of said indexing means being operative to support said control lever in a different pivoted position, and link means for coupling each of said control levers to one of said pumps so that the speed of said wheels will be controlled by the pivotal position of said control levers.